In order to research the relationship between coupling distance and transmission efficiency,study on the transmission characteristics of magnetic resonant coupling for wireless power transmission system,simulation model of wireless power transmission system via magnetic resonance coupling were established based on the theory of two ports network analysis method.The frequency expression of maximum efficiency and the resonant frequency splitting phenomenon condition of a contact-less power transmission system were derived.In a weak coupling at resonance,magnetic resonant coupling can transfer energy with high efficiency.The resonant frequency changes from two to one depending on the critical condition.Until a certain distance,maximum efficiencies are not got.The transmission characteristics of this system were researched by simulation software and experiments.The results show that the transmission characteristics are consistent with theoretical analysis and simulation.
展开▼
